[systemd-bugs] [Bug 66396] New: implement --header option in systemd-cryptsetup/crypttab

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66396

          Priority: medium
            Bug ID: 66396
          Assignee: systemd-bugs at lists.freedesktop.org
           Summary: implement --header option in
                    systemd-cryptsetup/crypttab
        QA Contact: systemd-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: wageslave at mail.ru
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: general
           Product: systemd

Original cryptsetup has an --header option:

man cryptsetup:
"--header <device or file storing the LUKS header>
Use  a  detached  (separated)  metadata  device or file where the LUKS header
is stored. This options allows to store ciphertext and LUKS header on different
devices."

But there are no such option in systemd-cryptsetup. I cannot use it in crypttab
too. What about of it's implementation?

It can be used for creation "hidden" volumes, which are not contains any
metadata about chipper end encryption type.
>From my point of view, it will be useful feature.

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